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Condensing Tube And Filtration Module Thereof

a technology of filtration module and condensing tube, which is applied in the direction of filtration separation, membranes, separation processes, etc., can solve the problems of limiting the implementation of md process, the availability of industrial md modules, etc., and achieve the effect of increasing the flux of agmd

Inactive Publication Date: 2011-11-24
CHUNG YUAN CHRISTIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]One object of the present invention is to provide a condensing tube, while applied in an air-gap membrane distillation (AGMD) module or system, to not only support the membrane but also provide the selection of different air gap thickness and groove number to thereby increase the permeate flux by adjusting these variable parameters or structures.
[0009]One object of the present invention is to provide a filtration module to combine with electric energy, solar energy, or waste heat energy as the heat source to provide temperature difference needed for carrying out membrane distillation so as to achieve the effect of various types of filtration. It is found that membrane distillation is more competitive relative to reverse osmosis when low cost heat energy is available.

Problems solved by technology

In searching the reports on the theory and experiments of AGMD, although some design and manufacturing reports about various membranes having high permeation can be found, the availability of the industrial MD modules is up to now one of the limitations for MD process implementation, even for AGMD.

Method used

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  • Condensing Tube And Filtration Module Thereof
  • Condensing Tube And Filtration Module Thereof
  • Condensing Tube And Filtration Module Thereof

Examples

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first embodiment

[0033]Therefore, in the present invention, a condensing tube is provided to be used as a condensing member in membrane distillation. The condensing tube comprises: a hollow body, a porous covering layer, and a condensation chamber. The hollow body has a central hollow compartment. The porous covering layer covers the hollow body and has gas permeability but is liquid impermeable. The condensation chamber is a space formed between the hollow body and the porous covering layer where a plurality of separation members are provided radially along the hollow body in the condensation chamber to divide the condensation chamber into a plurality of condensation compartments.

[0034]In one embodiment, the porous covering layer can comprise a porous membrane selected from the group consisting of the following or the combination thereof: polytetrafluoroethylene, polyvinylidene fluoride, cellulose acetate, or polysulfone. In addition, the porous covering layer can comprise a porous membrane and a m...

second embodiment

[0036]According to the present invention, a filtration module for membrane distillation is disclosed. The filtration module comprises a hollow body, a porous covering layer, a casing, an evaporation chamber, and a condensation chamber. The hollow body has a central hollow compartment. The porous covering layer covers the hollow body and has gas permeability but is liquid impermeable. The casing has an inlet for supplying a fluid to be filtered. The evaporation chamber is a space formed between the porous covering layer and the casing and is connected to the inlet of the casing where the evaporation chamber receives the heat from an external heat source to evaporate the fluid. The condensation chamber is a space formed between the hollow body and the porous covering layer and comprises an outlet connecting to the outside of the module where a plurality of separation members are provided radially along the hollow body in the condensation chamber to divide the condensation chamber into...

third embodiment

[0041]According to the present invention, a filtration module for membrane distillation is disclosed. The filtration module 100′ comprises a plurality of condensing tubes according to the invention.

[0042]FIG. 8 shows a three-dimensional perspective schematic diagram illustrating the filtration module 100′ according to one embodiment of the present invention. The filtration module according to this embodiment comprises a casing, a plurality of hollow bodies, a plurality of porous covering layers, an evaporation chamber, and a plurality of condensation chambers. The casing has an inlet for supplying a fluid to be filtered. Each hollow body has a central hollow compartment and the central hollow compartments connect to each other. The plurality of porous covering layers cover each hollow body and have gas permeability but are liquid impermeable. The evaporation chamber is a space formed between the porous covering layer and the casing and is connected to the inlet of the casing where t...

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Abstract

The present invention discloses a condensing tube and a filtration module thereof. The condensing tube comprises a hollow body having a central hollow compartment; a porous covering layer having gas permeability but being liquid impermeable; and a condensation chamber, being a space formed between the hollow body and the porous covering layer wherein a plurality of separation members are provided radially along the hollow body in the condensation chamber to divide the condensation chamber into a plurality of condensation compartments.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention is generally related to a condensing tube and a filtration module thereof, and more particularly to condensing tube and a filtration module thereof for membrane distillation.[0003]2. Description of the Prior Art[0004]Membrane distillation is a distillation process to separate a high-temperature liquid and a low-temperature liquid by a porous membrane which has gas permeability but being liquid impermeable. Generally, there are four basic configurations for membrane distillation (MD): direct-contact membrane distillation (DCMD), air-gap membrane distillation (AGMD), sweeping-gas membrane distillation (SGMD), and vacuum membrane distillation (VMD). Among them, AGMD exhibits the highest thermal efficiency. AGMD has not only been applied for separation of non-volatile components from water like desalination as other MD configurations, but also been specifically suitable to separate some volatile substa...

Claims

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Application Information

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IPC IPC(8): C02F1/04B01D61/36
CPCB01D5/0009B01D5/0012B01D61/364B01D2313/08B01D63/065B01D71/36B01D63/061B01D63/06Y02W10/37
Inventor CHEN, JUNG HUILIN, YU HUNG
Owner CHUNG YUAN CHRISTIAN UNIVERSITY